摘要 |
An optical instrument for indirectly observing an object includes a first lens system (A) for producing a first image of the object, and an adjustable second lens system (D) for producing a second image of the object. The second lens system (D) is continuously adjustable between a first position wherein the second image has maximum magnification and/or a minimum area of view and a second position wherein the second image is of a minimum magnification or/and a maximum area of view. In one aspect of the invention, the second lens system is a two-conjugate zoom lens system. In another aspect of the invention, the instrument defines a folded optical path through the lens systems which includes a generally U-shaped portion so as, in use, to reduce the separation of the observer and the observed object. |
申请人 |
REMRAF PTY. LTD. |
发明人 |
FARMER, JOHN, WILLIAM;SMITH, GEORGE;GIN, MALCOLM;BROOK, JOHN, FRANK, HAY;WHITE, DARYL, ROBIN;SEE, BRIAN, ARTHUR;POWELL, IAN |